Impeoved fastening foe window-blinds



mPETERS. PnoTmumnAPnaw. WASHINGTON. D. C.

@eine gisten-gamut @High IMPEOVED FASTBNING FB. WINDOW-BLINDS.

"dbs tlgslnle retentit' iu ligrsjdtrrcnimt'nut mating putt at tige time,

TO ALL WHOM IT MAY CONCRN: y

Be it known that I, L. M. TOWNSLEY, of Sedalia, in the county of Pettis, and State of Missouri, have inventeda new and useful Window-Blind Fastener' and Operator, and I do hereby declare that the following is a. fulland clear description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon. l A

The nature of this invention consists,rstly, in the application to a window-blind ofA a cog-wheel, the cogs i of which are of such a'peculiar construction that they will gear into, the cogs of a similar wheel in aline coinciding with the prolongation of the axis of the blind-hinges, although the latter wheel is attached to the window-frame to the outside of the former wheel, and Ain such a position that a radial line or diameter of it, drawn on its face, will not intersect ansimilar line drawn ou the face of the ot her wheel. The wheel which is attached to the window-frame is to be actuated by means of an axle, passing through the frame to the interior of the building, where it is provided with a crank, one half turn of which is suticient to Aopen or close the blind. This invention furthermore relates to a peculiar form of catch for holding the blind closed, which said catch can be operated from the inside of the house.

To enable those skilled in the art to make and use my improved \\'indow-blind fastener and operator I will proceed to describe its construction and operation.

Figure 1, of the drawings, is an outside eleva-tion of a window tted with one of the improved devices.

Figure 2 is an inside elevation' o f a window similarly ttcd.

Figure 8 is a horizontal section-ot` the window, showing the blind half open.

Figure 4 is a vertical central section of the window-sill, disclosing the catch used for holdingthe blind closed, and also the device for operating it.

'A is the window-sill, and A is the balance of :the window-frame, which is to be fitted with blinds or shutters vB, which may be hung to the frame .by means of thcV hinges a, such'as are usually employed to hang blinds on heuse windows. The shaft c, which passes through the window-frame A', has'a cog-wheel, C, on its outer end, and a crank, 01,. on its inner end, which is`used for the purpose of turning it. The cogs en the wheel C are not placed radially from its centre, but cach cog is a segment ot'- a circle, drawn from the base of the cog next in front of it, or from some point on the periphery ofthe wheel near the base of the preceding cog. Thus the coge/present a curved or hooked appearance, as shown in the drawings. lThe cogs on the wheel C2 are similar to those described on the wheel C. The wheel C2 is similar in every particular to the wheel C, and it is to be fastened to the blind inl such a manner as to have the cogs of the two wheels gear into each other on a line drawn from the axis of one of thehinges a to the axis oi' the other hinge. By using the curved cogs already described the wheel C will be able to turn the wheel C?, no matter in what position the blind maybe, that is, open, closed, or partly open. I am aware that cog-wheels have been arranged to workV within the casing of a window-frame in such amanner as to operate the blinds or shutters; but, owing to the diiculty and expense of fitting up windows in this manner, they have never coinc into general use, and consequently I have arranged the shaft e to pass directly through the nixdorf-frame, and then aiiixed the wheel C to it outside of the frame, thus using the minimum of labor and expense in the fitting up of these parts. Then the wheel C2 is tted to lthe blind or shutter B squarely with the back edge of it, andthe curved cogs are used for the purpose of gearing one wheel into the other, substantially as above described. 'The crank and the size of the' wheels C and C2 are so arranged that one half turn of the crank C will open 0,1' close the blind or shutter. This is a very desirable arrangement, asthe shaft c has to pass thronghthe janib of the window-frame, and the thickness of the inside finish would prevent the crank from turning in that directin, unless the sh'aftvc was made unnecessarily long. The-knob on the end of the crank may be used for the purposeof attaching the cord of the window-curtain to, to hold the curtain iip. The catch D, which is used to. hold the blind shut, is arranged to slide up and down in a vertical mortisc in the metallic frame Dl, which is secured to the window-sill A. The bent lever l)2 is pivoted to the frame Dl at d, and the horizontal arm of the -said lever has aslot, which embraces a pin inserted in the catch D. The spring dl, attached to the lower end of the vertical arm of the lever, draws it forward Vso as to throw the catch up; and the wire or rod CF, fastened to the lever, opposite its point Ofuttachment to the spring dl, is connected inside of the window-frame with a lever, D3, by 4means of which the lever D may be operated so as to withdraw the catch D, and thereby release the blind or' shutter.

' Having Adescribed my invent-ion, what I claim, is-

The combination and arrangement of the catch D, the spring c?, and the levers D2 and D3, substantially as described and set forth.

' L. M. TOWNSLEY.

Witnesses:

M. RANDOLPH, S. M. RANDOLPH. 

